I hope you enjoy the car for many happy miles. A couple of comments, if you don't mind... Since the car has sat for such a long period of time, I think you should change ALL fluids and flush the appropriate systems, engine oil, transmission fluid, differential oil, coolant, brake fluid. All related filters as well, and don't forget the battery acid level.
I don't recall the specifics, but I do remember coming across a problem with the M42 engine, I believe it was, perhaps something having to do with the water pump seal, or some other gasket. Do a little research, perhaps even on this forum, to check it out so you can avoid a big time problem.